Feeding device for circular sawing machines



(No Model.)

D. S. ABBOTT.

FEEDING DEVICE FOR CIRCULAR SAWING MACHINES.

Patented May 1'7, 1887.

wi/fweooeo emm O awmwto z CM 51' W 351 I arrow 113s 72 7M g wau DAVID S. ABBOTT, OF OLEAN, NFAV YORK.

FEEDING DEVICE FOR CIRCULAR SAWING MACHINES.

SPECIFICATION forming part of Letters Patent No. 362,921, dated May 17, 1887.

Application filed April ll, I886. Serial No. 19 ,846. (No model.)

.in the improved construction and combinations of parts, hereinafter fully described, and pointed out in the claims.

In the accompanying drawing, forming part of this application, I have illustrated my invention in a side elevation.

A represents the frame-work, having securel y bolted thereto the ways B, upon which ismounted and slides thereon the carriage 0. Upon the carriage O is dogged by suitable means the material to be sawed.

D represents a steamcylimler securely fastened in a vertical position to the frame-work,

- and having a pistonrod, E, and valve-rod F.

The cylinder may also be horizontally secured to the frame when the material is to be fed to a vertical saw. The piston-rod is secured to the carriage and has pivoted to it the latch lever G andinelincd bar J. It is obvious that the latchlever G and inclined bar J might be secured at convenient points on the carriage O, as may be desired.

K represents a lever fulcrnmed to the machine-frame at L and extended at right angles to the main lever to the point I, t'orminga sort of bell-crank.

H represents a curved lever fulcrumed on the pivot I, one end secured to the valve-rod and the other end terminating in lips I) b, curved in opposite directions. These lips are adapted to engage the latehlever G and in clined bar J.

Vhen the piston-rod is out its full stroke,it carries with it the material to be sawed above or beyond the saw, at which point it may be set over or regulated to any thickness of shin gle desired. The carriage is brought back by means ofthe latch-lever G engaging the lip b,

which moves the valve-rod F. At this point steam is admitted to the upper chamber of the cylinder, and thus the material is carried forward and engaged by the saw, as described. \Vhen the material has been sawed and the carriage is at its downward stroke, the inclined bar J engages the lip b and moves the valverod, thus admitting steam to the other chamber of the cylinder. Thisis thepoint ofstroke at which the drawing is made. \Vhen it is desired to change thestroke, I move the curved lever H nearer the inclined bar J by means of the lever K, and the said lever II engages the inclined bar J at an earlier point in its downward stroke, consequently giving the pistonrod a shorter stroke. The inclined bar Jand latch lever G may be cushioned, to prevent shocks, by placing springs in their rear, as shown at N.

The great advantage in using steam to feed the material is the perfect control over the motion that is derived, as the same maybe run swift in light cuts or soft timber and slow in heavy cuts or hard timber, regardless of the motion of the saw.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In a feeding device for shingle and heading machines, the combination, with the main frame, steam-cylimler, and carriage, of a piston-rod having pivoted thereon the inclined bar J and latclrlcver G, and the springs N, ail adapted for the purposes substantially as herein described.

2. In a feeding device for shingle and heading machines, the combination, with the main frame, steam-cylinder, and sliding carriage, of a crank-lever pivoted to the main frame and having fulcrumed thereon at the point I a curved lever, H, one end of said lever being pivoted to the valverod and the other end forming curved lips I) 1/, extending in opposite directions, said lips adapted to engage the inclined bar and latch-lever, substantially as herein described and set forth.

3. In a feeding device for shingle and heading machines, the combination, with the main frame A, carriage O, and steam-cylinder D,

having the valve-rod F and piston-rod E, .sai'd piston-rod having pivoted to it the inclined rod J and the latch-lever G, of the crank-arm K, secured to the main frarfie, and the curved 1ever H, fulcrumed to the lever K and having its ends one pivoted to the valve-rod and the other forming lips I) I), curved in opposite directions, and the springs N, all arranged and operating substantially as herein shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

DAVID S. ABBOTT.

Vitnesses:

HENRY H. LooKWooD, FRED. B. GEORGIA. 

